no one really knows for sure. supposedly he just... didn't fit. like, he didn't want to be part of the creative process, or contribute. but i think TAI just wasn't the right band for him.

my fangirl opinion, obviously, is that he and bill had a Thing and one of them wanted too much. i can only see them ending in disaster. which is why it's so hard to watch vids like this, b/c obv they had some good times.